Hand tool



Dec; 4, 1923'.

S. F. ANDERSON HAND TOOL Filed March 14. 1921 Fatented Bee. 4,

U. STA

SWAN -F. ANDERSON, I OF ROCKFORD, ILLINOIS.

HAND .IOOL.

Application filed MarchI i, 1921. Serial No. 452,080;

1 '0 all whom- ?It may concern.

Be it known that 'I, SWAN F. ANDERSON, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Hand Tools, of which the following is a specification.

This'invention relates in general to hand tools, and while illustrated in the present instance as embodied in a scraping tool, it is capable of embodiment in various other tools, such as cutters, chisels and the like, in which a sharp edged blade instead of a bluntblade, such as shown, is desirable.

In tools of this general character it has been customary to temper the end of the tool shank so that it will, when ground to the desired shape or sharpened, if preferred, present a working edge. Such constructions necessitate an entire shank of a high f grade material, and should the working portion or end thereof become broken or mutilated, the entire tool is rendered worthless.

One of the primary objects of my present invention isto provide a tool which shall be equipped with a detachable blade so. that should the blade become broken it maybe readily replaced by another. Y

Anotherfeature of my invention resides in the fact that the shank of the tool may be made of cheaper material than the blade, thus reducing the cost of manufacture. 4 A further object is to provide novel and improved means for det-achably securing the blade to the shank so that it may be readily removed therefrom when occasion requires,

but will be rigidly and securely locked in position on the shank when desired for use.

A. further feature resides in the construction of the blade and the holding means which serves to similarly lock the blade in position and prevents it from slipping upwardly on the shank, the construction being such that the greater pressure applied to the tool the tighter the blade will be locked in position.

Other objects and many of the inherent advantages of my invention should be readily appreciated as the same becomes better understood by reference to the following description when considered in connection with the accompanying drawings.

Referring to the drawings,

Figure 1 is aperspective view of a tool embodying my invention;

Fig. 2 is a longitudinal sectional view through theouter end of the worktool,

F ig. 3 is a fragmentary perspective view of the'outer end of the shanklooking'up wardly at Fig- 2; I

Fig. 4 is a similar-view 'showing the in ner face ofthe'holder; Fig. 5 is a similar view of the of the blade; and

Fig. 6 is a similar fragmentary view of the opposite face of the blade.

lower face Referring now to the drawings more in detail, reference character 7 indicates generally the shankof altool which is custom-I arily equipped with a handle 8. This shank is referably flat as shown, and the eiitremity thereof remote from the handle is tapered toward the end, as indicated by reference character 9. y 7

The blade, indicated generally .by reference character 11, is shown in this instance as having a blunt outer orworking end 12, which may be slightly curved transversely as shown in Figs. 1 and 5, although the working edge may be straight for certain kinds of work, and in manv. instances this edge may be sharpened for cutting purposes. Obviously, the shapeof the working edge of the blade is capable of wide variation, and the same shank may be used in conjuno tion with a number of different blades adapted for various purposesand Whichrnay be supplied andinterchangeably used with such shank if desired. At its opposite end this blade is. struck up toprovide a projection or lip 13, the purposes of which will be later explained.

The blade is adapted to lie fiat against the upper face of the shank 7 Fig. 2, with the 1 projecting lip 13 disposed away from the shank as shown. For purposes of locking this blade in operative position on the shank,

I have provided a holder comprising a rent tively fiat body 14: provided'at or near its outer end with clips 15 adapted to embrace These .lips are in- U the sides of the shank. turned in opposed relation as indicated at 16, to engage the face of the shank remote from the'blade. Near its outer end the holder is provided with similar clips 17, the

tapered face 9, will serve to draw the holder and shank together so as to snugly clamp the blade 11 in. position between the holder and shank with the operative end 12 projecting beyond the shank in position to engage the surface or object to be worked upon.

'lhe'inner face of the body 14 is provided with one or more recesses 19 and preferably a series of such recesses are provided, forming in effect, a row of serrations extending longitudinally of the body;- When the blade is interposed between the holder and shank the projection '18 at the inner endthereof, engages in one of these serrations 19, vthus locking the blade and holder against relative longitudinal movement, and when the holder and blade have been moved longitudinally onto the shank as far as is permitted by the clips 1'? the various parts will be rigidly and securely locked together, so that the blade will project inoperative position, and no amount of pressure exerted thereon will cause'it to move inwardly on the shank,

since an interlocking engagement is eifected between the projection 13 and one of the serrations 19. Obviously, he greater the pressure that is exerted longitudinally upon the blade, the more firmly the parts will be locked together, but when removal of the blade is desired it can be readily accomplished by simply sliding the holder and blade together longitudinally off the tapered extremity of the shank; While only one of the depressions 19 is engaged at any one time by the blade projection 13, a series of such recessesis preferably provided in order that the extent of projection of the working. end of the blade may be varied if desired,

and also in order that the device may be ac cominodated to blades of various lengths, or to the same blade in case it becomes shortened by prolonged nse or repeated grindings. It will be observed that the clips 15 and 17 on the blade holder or clamping plate are in the nature of retaining and clamping clips respectively. The clamping clips I? serve by engagement with the tapering portion of shank to clamp only that portion of the blade confined between said tapered portion of the shank and adjacent end portion of the clamping plate, while the clips 15 serve merely to retain the-serrated end of the plate in operative position against Y being forced away from the shank by lengthwise pressure on the blade. By reason of thisconstruction, the blade will be positively clamped at one end; the clamping pressure will be in direct proportion'to longitudinal pressure on'the projecting end of the blade; and by providing the retaining clips, acomparatively long blade may be used; 7

' It is believed that; invention, its construction and many of its inherent adva rtages will be understood and appreciated from the foregoing without further descrip tion, and while I have shown a preferred embodiment, obviously the structural details are capable of wide modification, within the scope of the invention as defined in the appended claims,

I'claim:

A hand tool of the character describedf' the tapered portion of the shank and the latter, the straight portion thereof, the clamping plate having on its underside a row of serrations spaced j longitudinally thereof, the lip on the blade being adapted to engage in any of said serrations when the clamping plate is loosened by movement of the shank toward its tapered end, the clamping'plate serving directly to clamp only the blade portion disposed between said plate and the tapered end portion of the shank by end pressure on the projecting end'of the blade, which pressure is transmitted through the blade lip to the clamping plate, andthe retaining clips serving to hold the serrated end of theclainping plate in operative relation to the blade lip while the clamping plate, blade and shank are in clamping relation.

SWAN F. ANDERSON. 

